package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.OrdersDto;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestParam;

import javax.xml.crypto.Data;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

 @Autowired
 private ShoppingCartService shoppingCartService;

 @Autowired
 private UserService userService;

 @Autowired
 private AddressBookService addressBookService;

 @Autowired
 private OrderDetailService orderDetailService;


 /**
  * 用户下单
  *
  * @param orders
  */
 @Transactional
 @Override
 public void submit(Orders orders) {

  //获得当前用户id
  Long userId = BaseContext.getCurrentId();

  //查询当前用户的购物车数据
  LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
  wrapper.eq(ShoppingCart::getUserId, userId);
  List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

  if (shoppingCarts == null || shoppingCarts.size() == 0) {
   throw new CustomException("购物车为空，不能下单");

  }

  //查询用户数据
  User user = userService.getById(userId);

  //查询地址数据
  Long addressBookId = orders.getAddressBookId();
  AddressBook addressBook = addressBookService.getById(addressBookId);
  if (addressBook == null) {
   throw new CustomException("用户地址信息有误，不能下单");
  }

  long orderId = IdWorker.getId();//订单号

  AtomicInteger amount = new AtomicInteger(0);

  //组装订单明细信息
  List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
   OrderDetail orderDetail = new OrderDetail();
   orderDetail.setOrderId(orderId);
   orderDetail.setNumber(item.getNumber());
   orderDetail.setDishFlavor(item.getDishFlavor());
   orderDetail.setDishId(item.getDishId());
   orderDetail.setSetmealId(item.getSetmealId());
   orderDetail.setName(item.getName());
   orderDetail.setImage(item.getImage());
   orderDetail.setAmount(item.getAmount());
   amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
   return orderDetail;
  }).collect(Collectors.toList());

  //组装订单数据
  orders.setId(orderId);
  orders.setOrderTime(LocalDateTime.now());
  orders.setCheckoutTime(LocalDateTime.now());
  orders.setStatus(2);
  orders.setAmount(new BigDecimal(amount.get()));//总金额
  orders.setUserId(userId);
  orders.setNumber(String.valueOf(orderId));
  orders.setUserName(user.getName());
  orders.setConsignee(addressBook.getConsignee());
  orders.setPhone(addressBook.getPhone());
  orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
   + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
   + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
   + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
  //向订单表插入数据，一条数据
  this.save(orders);
  //向订单明细表插入数据，多条数据
  orderDetailService.saveBatch(orderDetails);
  //清空购物车数据
  shoppingCartService.remove(wrapper);
 }


 public Page<OrdersDto> page(Integer page, Integer pageSize, Long orderID, String beginTime, String endTime) {
  Page<OrdersDto> ordersDtoPage = new Page<>(page, pageSize);

  return this.getBaseMapper().getOrdersAndOrderDetailsPage(ordersDtoPage, orderID, beginTime, endTime);
 }
}

